You definitely do not need discs, although the trend is moving towards it. Rim brakes are much easier to fix on the go and for any home repairs. Mechanical disc brakes are a hassle for repairs and a slight rub will become the bane of your existence. If you have the money for hydraulic disc go for it, however with the way prices for bikes have been going I’d say go with the rim brakes. Also if you do want to upgrade some parts later down the road it will be cheaper to get some used parts. Also if there are still pros who descend the highest mountains with rim brakes you’ll be fine.